RT Journal Article SR Electronic T1 PATENCY OF THE DUCTUS ARTERIOSUS IN THE NEWBORN CALF AND FOAL JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 92 OP 96 DO 10.1136/hrt.20.1.92 VO 20 IS 1 A1 E. C. Amoroso A1 G. S. Dawes A1 Joan C. Mott YR 1958 UL http://heart.bmj.com/content/20/1/92.abstract AB